Use php to implement the extraction of birthdays from ID card

Use php to extract birthdays from ID cards, including 15-digit and 18-digit ID cards
function getIDCardInfo($IDCard,$format=1){ 
 $result['error']=0;//0: Unknown error, 1: Identity card format error, 2: No error $result['flag']='';//0 indicates adulthood, 1 indicates minor $result['tdate']='';//Birthday, format: 2012-11-15 if(!preg_match("/^(\d{15}$|^\d{18}$|^\d{17}(\d|X|x))$/",$IDCard)){ 
  $result['error']=1; 
  return $result; 
 }else{ 
  if(strlen($IDCard)==18)
  { 
   $tyear=intval(substr($IDCard,6,4)); 
   $tmonth=intval(substr($IDCard,10,2)); 
   $tday=intval(substr($IDCard,12,2)); 
  }
  elseif(strlen($IDCard)==15)
  { 
   $tyear=intval("19".substr($IDCard,6,2)); 
   $tmonth=intval(substr($IDCard,8,2)); 
   $tday=intval(substr($IDCard,10,2)); 
  }
   
  if($tyear&gt;date("Y")||$tyear&lt;(date("Y")-100))
  { 
    $flag=0; 
   }
   elseif($tmonth&lt;0||$tmonth&gt;12)
   { 
    $flag=0; 
   }
   elseif($tday&lt;0||$tday&gt;31)
   { 
    $flag=0; 
   }else
   { 
    if($format)
    {
     $tdate=$tyear."-".$tmonth."-".$tday; 
    }
    else
    {
     $tdate=$tmonth."-".$tday; 
    }
     
    if((time()-mktime(0,0,0,$tmonth,$tday,$tyear))&gt;18*365*24*60*60)
    { 
     $flag=0; 
    }
    else
    { 
     $flag=1; 
    } 
   }  
 } 
 $result['error']=2;//0: Unknown error, 1: Identity card format error, 2: No error $result['isAdult']=$flag;//0 indicates adulthood, 1 indicates minor $result['birthday']=$tdate;//Date of Birth return $result; 
}